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Greenhouse Gases, Climate Change, and Energy <br />Another greenhouse gas, methane, comes from landt"ills, coal mines, oil and gas operations, and <br />agriculture; it represents 9 percent of total emissions. Nitrous oxide (5 percent of total emissions), <br />meanwhile, is emitted from burning fossil fuels and through the use of certain fertilizers and industrial <br />processes.. Human-made gases (2 percent of total emissions) are released as byproducts of industrial <br />processes and through leakage. <br />UVhat Is the Prospect for Future Eevtissions? <br />~S <br />World carbon dioxide emissions are expected to increase by 1.9 percent annually between 2001 and 2025 <br />(Figure 5). Much of the increase in these emissions is expected to occur in the developing world where <br />emerging economies, such as China and India, fuel economic development with fossil energy. Developing <br />countries' emissions are expected to grow above the world average at 2.7 percent annually between 2001 <br />and 2025; and surpass emissions of industrialized countries near 2018, <br />Figure 5. World Carbon Dioxide Emissions by Region, 2001-2025 <br />(Million Metric Tons of Carbon Equivalent) <br />http://www,eia.doe.gov/oiaf/1605/ggccebro/chapterl,html 8/25/2005 <br />